Hi all
For my new 66 charger I want to change the motor oil. I'd like to go synthetique ,is that a problem ? what grade of oil ?
Thanks for your input.

 

10-40 should be fine unless you are in the arctic or death valley(extreme hot or cold). Synthetics tend to find places to leak from if you motor is not sealed well.

 

That old of an engine was not built with synthetic in mind. Imo stick with conventional.

 

Just ordered this for my 66 Poly 318. Says it had 2100ppm zinc - whatever it was that motor oil of this age had in it. Specially made for old engines.

I have zero complaints on Lucad Products so far, but never used their motor oil. I mostly use their upper cyl head lubricant and used their tranny sealer once. Been using the upper cyl lube for around 12 years now.

 

Thanks all for your imput.yesterday I found some castrol syntec for classic cars. didn't know oil had change that much in its composition.